White gold



UNITED STATES.

DAVID BELAIS AND ALFRED R. BONDY, OF NEW YORK, N. Y.; SAID BONDY PATENT OFFICE.

Assmivon '10 SAID IBELAIS.

Patented Sept. 20, 1921.

WHITE GOLD.

1391,4 19. Specification of Letters Patent.

.N'o Drawing. Application filed October 24, 1919. Serial No. 333,067.

To all whom it may concern:

Beit known that we, DAVID Brains and ALFRED R. BONDY, citizens of the United States, and residents of New York, in the county and State of New York, have invented a certain new and useful Improvement in White Gold, of which the following is a specification.

Our invention relates to the production of an improved white gold. It is an improvement upon the white gold composition set forth in the patent of David Belais, one of the applicants herein, No. 1330231 of Feb. 10, 1920, which composition consisted of an alloy of gold, nickel and zinc. Like the white gold described in the said patent, our improved alloy has the appearance of platinum, and may be used as a substitute for it, especially in the jewelry art. It is tenacious, and is much' more ductile and malleable than the white gold of said pat-- ent, and is adapted for certain uses for which the said white gold is unfitted. 'For example, while the white gold of said patent can be drawninto solid wire, it is impossible to draw it into tubing), or seamlesstubing. Our improved alloy, cause of its highly tenacious, ductile and malleable character, can not only be drawn into solid wire, but can be drawn into tubing such as seamless tubing. This fits it for uses to which the said white gold, and "all other white golds on the market, are unadapted.

In the production of our improved alloy we take gold, especially or preferably fine gold, nick 1, preferably pure nickel, zinc, preferably ure zinc, and a minute quantity of platinum, and fuse them together in a suitable crucible, thoroughly mixing them together wh'le theyare thus fused. The niposition has the appearance of resulting co platinum and has thecharacteristics, and is adapted for the uses, above described. The alloy is prepared for the market in any suitable manner and form. We use a major part of igold and lesser parts of nickel and zinc, the zinc being used preferably in lesser proportions than the nickel, and the platinum being used in relatively minute uantities,less than one per cent. and pre erably less than one-half of one per cent. We have i found that satisfactory results can be obtained when the gold is used in the proportion of about seventy-five (75) to eightyfive (85) percent, nickel in the proportion of about ten (10) to eighteen (18) per cent., zinc in the proportion of about two (2) to nine (9) per cent., and of platinum only a fraction of a per cent., less than one-half (71;) per cent., and preferably from onethirtieth (1/30). or one-twenty-fifth (1/25) -to one-half (a) of one percent.

at. we claim as new and desire to secure'by Letters Patent, 1s:

1. As a composition of matter, white. gold alloy composed of a major part of gold,

lesser proportions of nickel and zinc, and a minute quantity of platinum adapted to make the alloy sufliciently ductile to be drawn into seamless tubing.

2. As a composition of matter,.a white goldalloy composed of a major part of gold, a lesser proportion of nickel, a still esser proportion of zinc, and a minutequantit of platinum adapted to make the al-v loy sufficiently ductile to be drawn into seamless tubing.

3. As a composition of matter, a white gold alloy composed of gold, nickel, zinc and platinum, the proportion of gold running from seventy-five (75) to eighty-five (85) per cent., the nickel from ten (10) to eighteen (18) per cent., the zinc from two (2) to nine (9) per cent., and the platinum being sufficient in amount to be adapted .to

make the alloy ductile enough to be drawn into seamless tubing half of one per cent.

4. As a composition of matter, a white gold alloy composed of gold, nickel, zinc and platinum, the proportion. of gold runnin from seventy-five (75) to eighty-five per cent., the nickel from ten (10) to eighteen (18) per cent., the zinc from two (2) to nine (9) per cent., and the platinum from one-thirtieth to one per cent. to onehalf of one per cent.

but not exceeding one- In testimony whereof, we have signed our names to this specification.

DAVID BELAIS. ALFRED R. BONDY. 

